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re PR libstdc++/65420 (Enumerators in std::regex_constants should be constexpr variables instead)

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PR libstdc++/65420
	* include/bits/regex_constants.h: Use constexpr variables for flags.
	* testsuite/28_regex/constants/constexpr.cc: New testcase.

From-SVN: r221750
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Tim Shen 2015-03-28 04:17:12 +00:00 committed by Tim Shen
parent 5351658ccc
commit 2894311302
3 changed files with 251 additions and 166 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
2015-03-28 Tim Shen <timshen@google.com>
PR libstdc++/65420
* include/bits/regex_constants.h: Use constexpr variables for flags.
* testsuite/28_regex/constants/constexpr.cc: New testcase.
2015-03-27 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/65499

351
libstdc++-v3/include/bits/regex_constants.h
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@ -77,88 +77,97 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* elements @c ECMAScript, @c basic, @c extended, @c awk, @c grep, @c egrep
* %set.
*/
enum syntax_option_type : unsigned int
{
/**
* Specifies that the matching of regular expressions against a character
* sequence shall be performed without regard to case.
*/
icase = 1 << _S_icase,
enum syntax_option_type : unsigned int { };
/**
* Specifies that when a regular expression is matched against a character
* container sequence, no sub-expression matches are to be stored in the
* supplied match_results structure.
*/
nosubs = 1 << _S_nosubs,
/**
* Specifies that the matching of regular expressions against a character
* sequence shall be performed without regard to case.
*/
constexpr syntax_option_type icase =
static_cast<syntax_option_type>(1 << _S_icase);
/**
* Specifies that the regular expression engine should pay more attention to
* the speed with which regular expressions are matched, and less to the
* speed with which regular expression objects are constructed. Otherwise
* it has no detectable effect on the program output.
*/
optimize = 1 << _S_optimize,
/**
* Specifies that when a regular expression is matched against a character
* container sequence, no sub-expression matches are to be stored in the
* supplied match_results structure.
*/
constexpr syntax_option_type nosubs =
static_cast<syntax_option_type>(1 << _S_nosubs);
/**
* Specifies that character ranges of the form [a-b] should be locale
* sensitive.
*/
collate = 1 << _S_collate,
/**
* Specifies that the regular expression engine should pay more attention to
* the speed with which regular expressions are matched, and less to the
* speed with which regular expression objects are constructed. Otherwise
* it has no detectable effect on the program output.
*/
constexpr syntax_option_type optimize =
static_cast<syntax_option_type>(1 << _S_optimize);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript
* Language Specification, Standard Ecma-262, third edition, 1999], as
* modified in section [28.13]. This grammar is similar to that defined
* in the PERL scripting language but extended with elements found in the
* POSIX regular expression grammar.
*/
ECMAScript = 1 << _S_ECMAScript,
/**
* Specifies that character ranges of the form [a-b] should be locale
* sensitive.
*/
constexpr syntax_option_type collate =
static_cast<syntax_option_type>(1 << _S_collate);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX basic regular expressions in IEEE Std 1003.1-2001,
* Portable Operating System Interface (POSIX), Base Definitions and
* Headers, Section 9, Regular Expressions [IEEE, Information Technology --
* Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
*/
basic = 1 << _S_basic,
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript
* Language Specification, Standard Ecma-262, third edition, 1999], as
* modified in section [28.13]. This grammar is similar to that defined
* in the PERL scripting language but extended with elements found in the
* POSIX regular expression grammar.
*/
constexpr syntax_option_type ECMAScript =
static_cast<syntax_option_type>(1 << _S_ECMAScript);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX extended regular expressions in IEEE Std 1003.1-2001,
* Portable Operating System Interface (POSIX), Base Definitions and
* Headers, Section 9, Regular Expressions.
*/
extended = 1 << _S_extended,
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX basic regular expressions in IEEE Std 1003.1-2001,
* Portable Operating System Interface (POSIX), Base Definitions and
* Headers, Section 9, Regular Expressions [IEEE, Information Technology --
* Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
*/
constexpr syntax_option_type basic =
static_cast<syntax_option_type>(1 << _S_basic);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is
* identical to syntax_option_type extended, except that C-style escape
* sequences are supported. These sequences are:
* \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\&apos,, &apos,,
* and \\ddd (where ddd is one, two, or three octal digits).
*/
awk = 1 << _S_awk,
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX extended regular expressions in IEEE Std 1003.1-2001,
* Portable Operating System Interface (POSIX), Base Definitions and
* Headers, Section 9, Regular Expressions.
*/
constexpr syntax_option_type extended =
static_cast<syntax_option_type>(1 << _S_extended);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is
* identical to syntax_option_type basic, except that newlines are treated
* as whitespace.
*/
grep = 1 << _S_grep,
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is
* identical to syntax_option_type extended, except that C-style escape
* sequences are supported. These sequences are:
* \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\&apos,, &apos,,
* and \\ddd (where ddd is one, two, or three octal digits).
*/
constexpr syntax_option_type awk =
static_cast<syntax_option_type>(1 << _S_awk);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility grep when given the -E option in
* IEEE Std 1003.1-2001. This option is identical to syntax_option_type
* extended, except that newlines are treated as whitespace.
*/
egrep = 1 << _S_egrep,
};
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is
* identical to syntax_option_type basic, except that newlines are treated
* as whitespace.
*/
constexpr syntax_option_type grep =
static_cast<syntax_option_type>(1 << _S_grep);
/**
* Specifies that the grammar recognized by the regular expression engine is
* that used by POSIX utility grep when given the -E option in
* IEEE Std 1003.1-2001. This option is identical to syntax_option_type
* extended, except that newlines are treated as whitespace.
*/
constexpr syntax_option_type egrep =
static_cast<syntax_option_type>(1 << _S_egrep);
constexpr inline syntax_option_type
operator&(syntax_option_type __a, syntax_option_type __b)
@ -233,111 +242,121 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* perform bitwise operations on these values and expect the right thing to
* happen.
*/
enum match_flag_type : unsigned int
{
/**
* The default matching rules.
*/
match_default = 0,
enum match_flag_type : unsigned int { };
/**
* The first character in the sequence [first, last) is treated as though it
* is not at the beginning of a line, so the character (^) in the regular
* expression shall not match [first, first).
*/
match_not_bol = 1 << _S_not_bol,
/**
* The default matching rules.
*/
constexpr match_flag_type match_default = static_cast<match_flag_type>(0);
/**
* The last character in the sequence [first, last) is treated as though it
* is not at the end of a line, so the character ($) in the regular
* expression shall not match [last, last).
*/
match_not_eol = 1 << _S_not_eol,
/**
* The first character in the sequence [first, last) is treated as though it
* is not at the beginning of a line, so the character (^) in the regular
* expression shall not match [first, first).
*/
constexpr match_flag_type match_not_bol =
static_cast<match_flag_type>(1 << _S_not_bol);
/**
* The expression \\b is not matched against the sub-sequence
* [first,first).
*/
match_not_bow = 1 << _S_not_bow,
/**
* The last character in the sequence [first, last) is treated as though it
* is not at the end of a line, so the character ($) in the regular
* expression shall not match [last, last).
*/
constexpr match_flag_type match_not_eol =
static_cast<match_flag_type>(1 << _S_not_eol);
/**
* The expression \\b should not be matched against the sub-sequence
* [last,last).
*/
match_not_eow = 1 << _S_not_eow,
/**
* The expression \\b is not matched against the sub-sequence
* [first,first).
*/
constexpr match_flag_type match_not_bow =
static_cast<match_flag_type>(1 << _S_not_bow);
/**
* If more than one match is possible then any match is an acceptable
* result.
*/
match_any = 1 << _S_any,
/**
* The expression \\b should not be matched against the sub-sequence
* [last,last).
*/
constexpr match_flag_type match_not_eow =
static_cast<match_flag_type>(1 << _S_not_eow);
/**
* The expression does not match an empty sequence.
*/
match_not_null = 1 << _S_not_null,
/**
* If more than one match is possible then any match is an acceptable
* result.
*/
constexpr match_flag_type match_any =
static_cast<match_flag_type>(1 << _S_any);
/**
* The expression only matches a sub-sequence that begins at first .
*/
match_continuous = 1 << _S_continuous,
/**
* The expression does not match an empty sequence.
*/
constexpr match_flag_type match_not_null =
static_cast<match_flag_type>(1 << _S_not_null);
/**
* --first is a valid iterator position. When this flag is set then the
* flags match_not_bol and match_not_bow are ignored by the regular
* expression algorithms 28.11 and iterators 28.12.
*/
match_prev_avail = 1 << _S_prev_avail,
/**
* The expression only matches a sub-sequence that begins at first .
*/
constexpr match_flag_type match_continuous =
static_cast<match_flag_type>(1 << _S_continuous);
/**
* When a regular expression match is to be replaced by a new string, the
* new string is constructed using the rules used by the ECMAScript replace
* function in ECMA- 262 [Ecma International, ECMAScript Language
* Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11
* String.prototype.replace. In addition, during search and replace
* operations all non-overlapping occurrences of the regular expression
* are located and replaced, and sections of the input that did not match
* the expression are copied unchanged to the output string.
*
* Format strings (from ECMA-262 [15.5.4.11]):
* @li $$ The dollar-sign itself ($)
* @li $& The matched substring.
* @li $` The portion of @a string that precedes the matched substring.
* This would be match_results::prefix().
* @li $' The portion of @a string that follows the matched substring.
* This would be match_results::suffix().
* @li $n The nth capture, where n is in [1,9] and $n is not followed by a
* decimal digit. If n <= match_results::size() and the nth capture
* is undefined, use the empty string instead. If n >
* match_results::size(), the result is implementation-defined.
* @li $nn The nnth capture, where nn is a two-digit decimal number on
* [01, 99]. If nn <= match_results::size() and the nth capture is
* undefined, use the empty string instead. If
* nn > match_results::size(), the result is implementation-defined.
*/
format_default = 0,
/**
* --first is a valid iterator position. When this flag is set then the
* flags match_not_bol and match_not_bow are ignored by the regular
* expression algorithms 28.11 and iterators 28.12.
*/
constexpr match_flag_type match_prev_avail =
static_cast<match_flag_type>(1 << _S_prev_avail);
/**
* When a regular expression match is to be replaced by a new string, the
* new string is constructed using the rules used by the POSIX sed utility
* in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable
* Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
*/
format_sed = 1 << _S_sed,
/**
* When a regular expression match is to be replaced by a new string, the
* new string is constructed using the rules used by the ECMAScript replace
* function in ECMA- 262 [Ecma International, ECMAScript Language
* Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11
* String.prototype.replace. In addition, during search and replace
* operations all non-overlapping occurrences of the regular expression
* are located and replaced, and sections of the input that did not match
* the expression are copied unchanged to the output string.
*
* Format strings (from ECMA-262 [15.5.4.11]):
* @li $$ The dollar-sign itself ($)
* @li $& The matched substring.
* @li $` The portion of @a string that precedes the matched substring.
* This would be match_results::prefix().
* @li $' The portion of @a string that follows the matched substring.
* This would be match_results::suffix().
* @li $n The nth capture, where n is in [1,9] and $n is not followed by a
* decimal digit. If n <= match_results::size() and the nth capture
* is undefined, use the empty string instead. If n >
* match_results::size(), the result is implementation-defined.
* @li $nn The nnth capture, where nn is a two-digit decimal number on
* [01, 99]. If nn <= match_results::size() and the nth capture is
* undefined, use the empty string instead. If
* nn > match_results::size(), the result is implementation-defined.
*/
constexpr match_flag_type format_default = static_cast<match_flag_type>(0);
/**
* During a search and replace operation, sections of the character
* container sequence being searched that do not match the regular
* expression shall not be copied to the output string.
*/
format_no_copy = 1 << _S_no_copy,
/**
* When a regular expression match is to be replaced by a new string, the
* new string is constructed using the rules used by the POSIX sed utility
* in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable
* Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
*/
constexpr match_flag_type format_sed =
static_cast<match_flag_type>(1 << _S_sed);
/**
* When specified during a search and replace operation, only the first
* occurrence of the regular expression shall be replaced.
*/
format_first_only = 1 << _S_first_only,
};
/**
* During a search and replace operation, sections of the character
* container sequence being searched that do not match the regular
* expression shall not be copied to the output string.
*/
constexpr match_flag_type format_no_copy =
static_cast<match_flag_type>(1 << _S_no_copy);
/**
* When specified during a search and replace operation, only the first
* occurrence of the regular expression shall be replaced.
*/
constexpr match_flag_type format_first_only =
static_cast<match_flag_type>(1 << _S_first_only);
constexpr inline match_flag_type
operator&(match_flag_type __a, match_flag_type __b)

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libstdc++-v3/testsuite/28_regex/constants/constexpr.cc Normal file
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@ -0,0 +1,60 @@
// { dg-options "-std=gnu++11" }
// { dg-do compile }
//
// Copyright (C) 2015 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 28.5.4
#include <regex>
// libstdc++/65420
void
test01()
{
const std::regex_constants::syntax_option_type* option __attribute__((unused));
option = &std::regex_constants::icase;
option = &std::regex_constants::nosubs;
option = &std::regex_constants::optimize;
option = &std::regex_constants::collate;
option = &std::regex_constants::ECMAScript;
option = &std::regex_constants::basic;
option = &std::regex_constants::extended;
option = &std::regex_constants::awk;
option = &std::regex_constants::grep;
option = &std::regex_constants::egrep;
const std::regex_constants::match_flag_type* flag __attribute__((unused));
flag = &std::regex_constants::match_not_bol;
flag = &std::regex_constants::match_not_eol;
flag = &std::regex_constants::match_not_bow;
flag = &std::regex_constants::match_not_eow;
flag = &std::regex_constants::match_any;
flag = &std::regex_constants::match_not_null;
flag = &std::regex_constants::match_continuous;
flag = &std::regex_constants::match_prev_avail;
flag = &std::regex_constants::format_default;
flag = &std::regex_constants::format_sed;
flag = &std::regex_constants::format_no_copy;
flag = &std::regex_constants::format_first_only;
}
int main()
{
test01();
return 0;
}